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40-65 (0.4094 groove) new to me revisited? (Read 434 times)

bohemianway Oldtimer Offline Posts: 659 Location: Andover, MN Joined: Apr 16^th, 2004	40-65 (0.4094 groove) new to me revisited? Oct 24^th, 2025 at 1:50pm	Print Post
	What's new is that the barrel is marked BADGER 16 twist .4094 which begs the question about the responses I received. The Shiloh dies are listed as .408 and the reamer shows .4085 so I assume I will need to cast the chamber and find die set to match? I promised myself "No New Calibers" but I acquired a 30 year old CPA (needs stock fitting) kit Paul Shuttleworth fitted and finished Badger 1:16 #4 barrel. So during this winter I plan to finish the rifle and start loading for it. Since I do not have that caliber I could use some guidance relative to the tools needed (I have bullet molds for the .40 cal and all the usual tools needed for BP and smokeless). Items: 1) Die set (Redding, RCBS, specific dies) for both BP and SL. 2) Compression die I can figure out. 3) Brass (I have a ton of 45-70 new Starline if forming is the way to go but then need to know if the dies above can handle it) or Newly available Starline 40-65? I guess it just boils down to Brass and Die recommendations. Thank you (in advance), Charles
	« Last Edit: Oct 27^th, 2025 at 5:45pm by bohemianway »

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bpjack Frequent Elocutionist Offline Posts: 3394 Location: East Olympia, WA Joined: May 18^th, 2008	Re: 40-65 new to me caliber what tools? Reply #1 - Oct 24^th, 2025 at 2:32pm	Print Post
	Do yourself a favor and buy the RCBS Shiloh die set. I had to also buy a Buffalo arms expander plug in a smaller size since my moulds drop bullets that fall into a .410 expanded case not a bid deal with BP though. I am still exploring that chambering in my heavy barreled coil spring high wall Jack
	« Last Edit: Oct 24^th, 2025 at 3:24pm by bpjack »
	ASSRA # 11318 There are more hydrogen atoms in a single molecule of water than there are suns in the entire solar system.
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1Hawkeye Full Member Offline Posts: 188 Location: South end of Northern Virginia Joined: Jun 29^th, 2019	Re: 40-65 new to me caliber what tools? Reply #2 - Oct 24^th, 2025 at 2:55pm	Print Post
	Plus 1 on the rcbs shiloh die set and for brass you can either get starline or make your own from .45-70 brass if you make your own I've found the hornady brass works great because you don't have to trim very much like when you are using the full length cases. If you can find one noe made a great mold for the .40-65 number 412-400 it's a 400 gr money shape.


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 17275 Location: Oregon Joined: Feb 2^nd, 2009	Re: 40-65 new to me caliber what tools? Reply #3 - Oct 24^th, 2025 at 4:05pm	Print Post
	With some Imperial sizing wax you can size down .45-70 brass easily. Might begin by not trying to do it in one pull on the press handle though. I usually do about 3 steps, backing the press up each time before trying again. Never stuck a case, or ruined one either.

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cheatin_charlie Senior Forum Member Offline Posts: 410 Location: ohio Joined: Jan 10^th, 2009	Re: 40-65 new to me caliber what tools? Reply #4 - Oct 24^th, 2025 at 4:21pm	Print Post
	Best do a chamber cast to make sure what 40-65 you have. I built 3 rifles years ago with a 40-65 Ron Long reamer and had to get RCBS Ron Long dies to form cases that fit. Normal dies would not work. Charlie


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rkaires Frequent Elocutionist Offline No Stronger Bond Posts: 1661 Location: Dingmans Ferry, PA Joined: Oct 26^th, 2012	Re: 40-65 new to me caliber what tools? Reply #5 - Oct 25^th, 2025 at 5:18am	Print Post
	If CPA chambered it this should be the reamer they used.

	(You need to *Login* or *Register* to view media files and links) ( 113 KB \| 20 Downloads ) ASSRA #11031 NRA Life Proud Noodlehead "Peace is that brief, glorious moment in history, when everybody stands around reloading."~ ~ Thomas Jefferson
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bohemianway Oldtimer Offline Posts: 659 Location: Andover, MN Joined: Apr 16^th, 2004	Re: 40-65 (0.4094 groove) new to me revisited? Reply #6 - Oct 27^th, 2025 at 6:01pm	Print Post
	BTT for added info


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gunlaker Frequent Elocutionist Offline Posts: 2440 Location: lower mainland, B.C. Joined: Dec 13^th, 2010	Re: 40-65 (0.4094 groove) new to me revisited? Reply #7 - Nov 1^st, 2025 at 5:22pm	Print Post
	I use the RCBS Shiloh dies. I've always made my cases with Remington 45-70 brass and do it like Marlinman says. It works great. That brass is softer than Starline so it might take a little more care with the Starline. My 40-65's are Shiloh's so your rifle may have different preferences, but mine like the Saeco #740 bullet at the Buffalo Arms 409400M4. I've only shot mine with black powder so can't say about smokeless, but with Swiss 1.5 it is extremely accurate and both have won a good number of the matches they were used in. I'm sure you'll love the cartridge. I plan to have mine buried with me Chris.


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JKR Full Member Offline Posts: 101 Joined: Nov 2^nd, 2021	Re: 40-65 new to me caliber what tools? Reply #8 - Nov 2^nd, 2025 at 8:20am	Print Post
	bpjack wrote on Oct 24^th, 2025 at 2:32pm: Do yourself a favor and buy the RCBS Shiloh die set. I had to also buy a Buffalo arms expander plug in a smaller size since my moulds drop bullets that fall into a .410 expanded case not a bid deal with I am still exploring that chambering in my heavy barreled coil spring high wall Jack Jack, What’s the deal with the RCBS Shiloh dies? Why are they different from others? I’m currently collecting tools and components for a new 40-65 scheduled to be finished in January. I have a collections of dies but no RCBS Shiloh. Have you had good results with the Lyman Snover bullet?


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bpjack Frequent Elocutionist Offline Posts: 3394 Location: East Olympia, WA Joined: May 18^th, 2008	Re: 40-65 (0.4094 groove) new to me revisited? Reply #9 - Nov 2^nd, 2025 at 11:26am	Print Post
	I only have the Shiloh dies as that was the recommended set to get. Gunlaker is a better resource than I am. My chamber is tight and I can’t seat rounds unless I size the bullet to .408 to make fixed ammo.

	ASSRA # 11318 There are more hydrogen atoms in a single molecule of water than there are suns in the entire solar system.
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gunlaker Frequent Elocutionist Offline Posts: 2440 Location: lower mainland, B.C. Joined: Dec 13^th, 2010	Re: 40-65 (0.4094 groove) new to me revisited? Reply #10 - yesterday at 7:52pm	Print Post
	The RCBS dies squeeze the case down above the web just a tiny bit more than the regular dies, maybe 0.001". I have those and the RCBS Cowboy dies. With the chambers in my Shiloh Sharps the brass is a bit too tight if I use the sizer in the Cowboy dies. The Cowboy ones also say "0.410 bore on them". I just checked the expander diameter on mine and both sets are the same at 0.407". I don't use those anyway. Chris.


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oneatatime Frequent Elocutionist Offline Posts: 4164 Location: Rocky Mountains Joined: Oct 30^th, 2011	Re: 40-65 (0.4094 groove) new to me revisited? Reply #11 - yesterday at 7:59pm	Print Post
	Wasn't it because Shiloh had a reamer that made a tight chamber?


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